표제지
목차
Nomenclature 10
Abstract 12
제1장 서론 14
1.1. 연구배경 14
1.2. 연구동향 21
1.3. 연구 내용 및 목적 25
제2장 동력전달장치 27
2.1. 변속기 원리 및 작동방식 27
2.1.1. 토크와 회전수 27
2.1.2. 작동방식 30
2.2. 변속기 구조 34
2.2.1. 수동변속기(M/T) 34
2.2.2. 자동변속기(A/T) 35
2.2.3. 자동화수동변속기(AMT) 37
2.3. 변속 제어 40
2.3.1. 변속 제어 개요 40
2.3.2. 토크 컨버터식 41
2.3.3. 이중 클러치식 45
2.4. 변속 품질 47
제3장 실차 시험 49
3.1. 시험조건 및 계측 방법 49
3.1.1. 시험조건 49
3.1.2. 계측 방법 50
3.2. 데이터 수집 58
제4장 변속 제어 결과고찰 63
4.1. 제어력 교차구간 63
4.1.1. A/T 제어 유압 63
4.1.2. AMT 변속 제어 73
4.1.3. A/T와 AMT의 비교특성 82
4.2. APS 고 개도 영역 85
제5장 변속속도 결과고찰 90
5.1. 관성 영역 변속 90
5.1.1. A/T 특성 90
5.1.2. AMT 특성 97
5.2. 엔진 토크저감 105
제6장 제반 변속특성 107
6.1. 기어단 영향 107
6.2. 변속 구간의 영향 111
6.3. APS 개도에 따른 소요 시간 및 회전수 115
제7장 결론 123
참고 문헌 125
부록 129
부록I. 변속종류별 제어 129
부록II. APS 개도 상위 영역의 제어유압 및 토크 133
A2.1. Engaged and disengaged of A/T 133
A2.2. Engaged and disengaged pressure of AMT 134
Table 1.1. Types of regulation for internal combustion engine vehicles 16
Table 2.1. Load surface resistance 29
Table 2.2. Air resistance coefficient 29
Table 3.1. Specification of vehicle 49
Table 3.2. Specifications of measuring device 50
Table 3.3. Terminal identification and connection 55
Table 3.4. CAN list of main signals related to shifting during monitoring 56
Table 3.5. Measurement conditions 57
Table 6.1. Gear ratio at auto transmission 107
Fig. 1.1. Forecast of the 2019 automotive market 14
Fig. 1.2. Lock-up clutch system 17
Fig. 1.3. Torque converter 17
Fig. 1.4. Motor torque characteristics 18
Fig. 1.5. Patents filed per year for transmission technology 21
Fig. 2.1. Engine characteristic curve 27
Fig. 2.2. Classification of automobile transmission 31
Fig. 2.3. Overview of automotive power train 32
Fig. 2.4. Structure of manual transmission 35
Fig. 2.5. Structure of auto transmission 36
Fig. 2.6. 9-speed A/T 36
Fig. 2.7. 12-Speed AMT of bus 38
Fig. 2.8. Engine and drive train 40
Fig. 2.9. Structure of dual clutch transmission 41
Fig. 2.10. Automatic transmission 42
Fig. 2.11. Structure of torque converter 43
Fig. 2.12. Structure of dual clutch transmission 46
Fig. 2.13. Shifting shock torque 47
Fig. 3.1. CAN monitoring tool and OBD-II connector 51
Fig. 3.2. Vehicle test data measurement using computer 52
Fig. 3.3. CAN communication connection diagram 53
Fig. 3.4. Check signal data 53
Fig. 3.5. Power on upshift at dry clutch AMT 58
Fig. 3.6. Data acquisition 59
Fig. 3.7. Comparison of rpm variation 61
Fig. 3.8. Comparison of torque variation at APS=30% 62
Fig. 4.1. Power on upshift on wet AMT 63
Fig. 4.2. Engaged and disengaged pressure characteristics 66
Fig. 4.3. Comparison of A/T pressure characteristics 72
Fig. 4.4. Shift pressure characteristics from 1st to 2nd stage 75
Fig. 4.5. Torque characteristics of AMT 81
Fig. 4.6. M/T and AMT clutch 83
Fig. 4.7. Comparison of control pressure from 2nd to 3rd stage 84
Fig. 4.8. Fuel efficiency and CO₂ emissions according to acceleration. 85
Fig. 4.9. Acceleration performance 86
Fig. 4.10. Engaged and disengaged pressure of A/T 88
Fig. 4.11. Shift pressure and torque of AMT 89
Fig. 5.1. Engine speed change ratio on power on upshift 93
Fig. 5.2. Torque converter sleep ratio 93
Fig. 5.3. RPM characteristics with torque converter 94
Fig. 5.4. Sleep control before inertia phase 99
Fig. 5.5. RPM characteristics of dry type AMT 100
Fig. 5.6. Comparison of rpm variation and acceleration 103
Fig. 5.7. Engine speed change ratio at AMT shift 104
Fig. 5.8. Engine torque decrease during inertia phase at power on upshift 105
Fig. 6.1. A/T shifting time according to the APS 109
Fig. 6.2. Engine speed change ratio 110
Fig. 6.3. Shift pattern 111
Fig. 6.4. Power on upshift time at AMT 113
Fig. 6.5. Engine speed change ratio 114
Fig. 6.6. Start-end rpm during inertia phase 118
Fig. 6.7. Actual shift time 120
Fig. 6.8. Upshift decrease rpm during inertia phase 121
Fig. A1.1. Vehicle shift classification 130
Fig. A2.1. Engaged and disengaged pressure of A/T 134
Fig. A2.2. Shift pressure and torque from 1st to 2nd stage 135